Migrate a Rails App from Heroku to Dokku [Step by Step Tutorial]

Dokku is dev ops for dummies and a cheaper alternative to Heroku. Recently I’ve migrated a couple of my projects to it. In this tutorial, I will describe how to setup and migrate a Rails app to Dokku with PostgreSQL, Sidekiq, Redis and Let’s Encrypt or Cloudflare for free SSL. This tutorial is based on Dokku version 0.28.4. For a more in-depth tutorials, you can check out Dokku docs. I will focus